Stirrup for door-latches of excavating-dippers.



E. L. PEMBBRTON. STIRRUP FOR DOOR LATOHES 0F EXGAVATING DXPPEBS. APPLICATION FILED mm: 12. 1912.

1,096, 15 1 Patented May 12, 1914.

In ventof:

end of a latch carried a part oil this application EDWARD I1. E'EMBERTOll', OF NEW HAVEN, CONNECTICUT, MlfizIGNOR '10 EDGAR ALLI JH AMERICAN MANGANESE STEEL COMPANY, 0F

0' MAINE.

AUGUSTA, MAINE, A CORPORATION SIHIELEUP F031 DOOE-LATCHES OF EKCAVATwG-DIPPEBS.

Ltl tidfili.

To all whom it may concern:

Be it known that l, Enwann L. Pennanrou, a citizen of the United States, and a resident of New Haven, in the county of New Haven and State of Connecticut, have made and invented certain new and useful Improvements in Stirrups for Door-liatchcs oi Excavating-Dippers, of which the following is a specification,

My invention relates to dippers for excavating, dredging, digging and similar machines, and more particularly to a stirrup employed in such clippers for receiving the by the swinging, door with which such dippers are provided, to thereby hold the door in closed condition and retain the contents of the dipper within the same until the latch is disengaged from the stirrup and the contents oi the dipper permitted to fall therefrom.

In the practical use of dippcrs for excavating machines, the dipper body often permitted to fall, thus bringing the projecting end of the stirrup into violent contact with rocks or with a hard surface, which action tends to shear the rivets which are commonly employed for the purpose of securing the stirrup to the dipper body; 1 nd' my invention, more specifically stated, contemplates an arrangement of stirrup in which thrust due to violent contact of the end of the stirrup with rocks or hard surfaces will be absorbed by a member in the nature of a lug formed integral with the dipper body, so that the rivets whereby the stirrup is secured in place will not be subjected to shearing strains.

The drawing accompanying and tor-mine illustrates the preferred embodiment. of my invention, al-

though it will be understood that the same is capable of embodiment. in other specific forms, and that my invention includes such variations and modifications of the Specific form illustrated as will be obvious to those skilled in the art to which my invention 1elates.

Referring to the drawing: Figure l is a view mainly inside elevation, but partially broken away to show internal construction, of a dipper equipped with my improved stirrup; Fig. 2 is a view showing the front wall of the dipper body as seen from a position within the same- Fi $3 is Specification of Letters Eatent.

Application filed June 12, 1912.

Patented May 12, tint ii. Serial No: 703,132.

, a. view showing the stirrup separately; Fig. i at 18 a view showing the stirrup as seen from a position at right angles to t le position assumed in 1 1g. 3; and, l 1g. 5 15 a view showing; a section upon a transverse plane indica ted by the line 5-4), Figs. 1 and 2.

In the drawing, the reference character (3 designates the body portion of a dipper for excavating and similar machines, the same being made ordinarily of cast metal, and commonly in two pieces, as shown in the drawing, each piece comprising sub stantially one-half of the dipper body, although the construction of the body of the dipper is in no way involved in my invention. The lower end of the dipper body is closed by means oi? a door 7 carried by suit able arms 8, which in turn are pivoted at 9 to the rear portion of the dipper body, so that the door may swing! about its pivot to discharge the contents of the dipper. The door carries a latch 10 simportcd in suitable bearings upon its undo; side, and the free end of this latch entra ts a stirrup 11 when the door is in closed condition to thereby retain the contents of the dipper within the sanie until the latch is disengaged from the stirrup, which action per,- mits the door to open and the contents to flow from the dipper, as will be understood.

The stirrup 1.1. extends below the lower end of the dipper body a sn'llicient distance to be engaged by the free end of the latch 10 as above ertplained, and the upper end oi this stirrup abuts against or is in engagement with a thrust absorbing men'ibcr pro-- jecting from the surface of the dipper, the purpose of which thrust absorbing member is to absorb forces acting along the length of. the stirrup and thus transverse to the rivets. due to the projecting end. of the stirrup being, brought into violent contact with rocks or other obstructions.

The thrust absorbing member above referred to is preferably made up of the walls of a recess formed in the inner surface of the dipper body adjacent the lower end thereof, as shown in the drawing, this rc cess being preferably tapering in term as shown in Fig. 2, and having do\e-tailed or under-cut sides as will be understood from the crosssectional view, Fig. 5. The recess is shown as bounded by a projecting wall is extending about the same, although it. will lit) ltHl

luii

the walls of the we understood that the recess may lie entirely beneath the inner surface of the dipper body.

The stirrup 11 is provided with a hole 13 adjacent its lower end into which the free end of the latch 10 enters when the door is closed, and the said stirrup is preferably provided with a shoulder 14 which engages the lower edge of the dipper body when the stirrup is in place to thereby form an additional element for taking up thrust due to blows to which the stirrup is subjected. The stirrup when in position Within the recess as aforesaid, will be secured in place by means i rivets 15; but it will be understood that these rivets will not be subjected to excessive shearing stresses due to forces acting transverse to the rivets or longitudinally of the stirrup, such torces being absorbed by recess or other form of thrust absorbing member, as above explained; from which it follows that the rivets need only be of sufficient strength to support the weight of material within the dipper as a dead load, and that they are never subjected to shearing action due to blowsor shocks due to the free lower end of the stirrup coming into violent contact with rocks or other obstructions.

Having thus described and explained my invention, 1 claim and desire to secure by Letters Patent:

1. in a dipper for excavating and similar machines, a dipper body having a projecting thrust absorbing member adjacent its lower end; a stirrup in engagement with said member and extending below the lower end of said body and adapted to be engaged by the end of a door latch, said stirrup having a shoulder adapted to engage the lower stirrup having a engaged by a door latch; 'means for securing said st1rrup 111 place noeaaei end of said body; and fastening means for securing said stirrup in place.

2. In a dipper for excavating and similar machines, a dipper body having a recess adjacent its lower end; a stirrup located within said recess and extending below the lower end of said body and adapted to be engaged by the end of a door latch; said shoulder adapted to engage the lower end of said body and fastening means for securing said stirrup in place Within said reces 3. In a dipper for excavating and similar machines, a dipper body having a recess adjacent its lower end and located upon the inner surface of said body; a stirrup located within said recess and extending below the lower end of said body and adapted to be and fastening within said recess.

at. In a dipper for excavating and similar machines, a dipper body having a recess adjacent its lower end and the side walls of which are beveled; a stirrup located within said recess and beveled to correspond with the walls thereof, said stirrup extending below the lower end of said body and adapted to be engaged by the end of the door latch; and fastening means for securing said stirrup in place within said recess.

Signed at New York, borough of Manhattan, in the county of New York, and State of New York, this 22nd day of May, A. D. 1919;.

EDWARD L. PEMBEBTON.

Witnesses MARY B. Jo S'llCE, R. N. FLINT. 

